| /* |
| * Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license. |
| */ |
| |
| // This file was automatically generated from coroutines-guide.md by Knit tool. Do not edit. |
| package kotlinx.coroutines.guide.select01 |
| |
| import kotlinx.coroutines.* |
| import kotlinx.coroutines.channels.* |
| import kotlinx.coroutines.selects.* |
| |
| fun CoroutineScope.fizz() = produce<String> { |
| while (true) { // sends "Fizz" every 300 ms |
| delay(300) |
| send("Fizz") |
| } |
| } |
| |
| fun CoroutineScope.buzz() = produce<String> { |
| while (true) { // sends "Buzz!" every 500 ms |
| delay(500) |
| send("Buzz!") |
| } |
| } |
| |
| suspend fun selectFizzBuzz(fizz: ReceiveChannel<String>, buzz: ReceiveChannel<String>) { |
| select<Unit> { // <Unit> means that this select expression does not produce any result |
| fizz.onReceive { value -> // this is the first select clause |
| println("fizz -> '$value'") |
| } |
| buzz.onReceive { value -> // this is the second select clause |
| println("buzz -> '$value'") |
| } |
| } |
| } |
| |
| fun main() = runBlocking<Unit> { |
| val fizz = fizz() |
| val buzz = buzz() |
| repeat(7) { |
| selectFizzBuzz(fizz, buzz) |
| } |
| coroutineContext.cancelChildren() // cancel fizz & buzz coroutines |
| } |